Change: [CI] Temporarily force ubuntu-24.04 runner for linux workflow

While ubuntu-latest is transitioning from ubuntu-22.04 to ubuntu-24.04, the one we actually run on is random.
But our workflow can work only with 22.04 (using clang15) or 24.04 (using clang) so just force 24.04 for now.

.github/workflows/ci-build.yml

@@ -26,8 +26,8 @@ jobs:
       matrix:
         include:
         - name: Clang
-          compiler: clang-15
-          cxxcompiler: clang++-15
+          compiler: clang
+          cxxcompiler: clang++
           libraries: libsdl2-dev
         - name: GCC - SDL2
           compiler: gcc

.github/workflows/ci-linux.yml

@@ -23,7 +23,7 @@ jobs:
   linux:
     name: CI
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     env:
       CC: ${{ inputs.compiler }}
       CXX: ${{ inputs.cxxcompiler }}